Cet-4-1.17-Exercise 02Aside from the panels on the roof, Premier Gardens looks like a community of conventional homes. But inside, special windows cut power bills by blocking solar heat in the summer and retaining indoor warmth in winter. The rest of the energy savings comes from the solar units. They don’t just feed the home they serve. If they generate more power than the home is using, the excess flows into the utility’s power grid. The residents are billed by “net metering”: they pay for the amount of power they tap off the grid, less the kilowatts they feed into it. If a home generates more power than it uses, the bill is zero. How are the residents in the ZEH communities billed for electricity use?

A. They are confident of their future.
B. They do not get decent pay.
C. They pay for the electricity from the grid less their home-generated power.
D. They only pay for the excess power that flows into the utility’s power grid.